APA (7th ed.) Citation

Davis, C. O. (2007). A Guide to Methods and Observation in History Studies in High School Observation. Project Gutenberg.

Chicago Style (17th ed.) Citation

Davis, Calvin Olin. A Guide to Methods and Observation in History Studies in High School Observation. Project Gutenberg, 2007.

MLA (9th ed.) Citation

Davis, Calvin Olin. A Guide to Methods and Observation in History Studies in High School Observation. Project Gutenberg, 2007.

Warning: These citations may not always be 100% accurate.